[css-counter-styles] Fix Bikeshed warnings.

Author: tabatkins

css-counter-styles/Overview.bs

@@ -14,7 +14,7 @@ Previous Version: http://www.w3.org/TR/2012/WD-css-counter-styles-3-20121009/
 Editor: Tab Atkins Jr., Google, http://xanthir.com/contact/
 Abstract: This module introduces the ''@counter-style'' rule, which allows authors to define their own custom counter styles for use with CSS list-marker and generated-content counters [[CSS3LIST]]. It also predefines a set of common counter styles, including the ones present in CSS2 and CSS2.1.
 Issue Tracking: Bugzilla https://www.w3.org/Bugs/Public/buglist.cgi?product=CSS&component=Counter%20Styles&resolution=---
-Link Defaults: css-text-3 (dfn) grapheme cluster
+Link Defaults: css-text-3 (dfn) grapheme cluster, css-pseudo-4 (selector) ::marker
 </pre>
 <style>
 pre.stylesheet { white-space: pre-wrap; }